Improvement in bending carriage-thills



UNITED STATES PATENTr OEEICE.

JESSE W. DANN, OF COLUMBUS, OHIO.

IMPROVEMENT IVN BENDING CARRIAGE-THILLS.

Specification forming part of Letters Patent No. 57,294, dated August 21, 1866.

To all whom it may concern.-

Be it known that I, JESSE W. DANN, of Columbus, in the county of Franklin and State of Ohio, haveinvented an Improvementin the Mode of Bending Buggy Shafts or Thills; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a perspective view, showing the bending and holding device of a shaft. Fig. 2 is a view showing the position of the shaft before it is bent. Fig. 3 is a top view of Fig. 2. Fig. 4 is a side view, showing the heel end of a shaft bent on its former and confined thereon.

Similar letters of reference indicate correspending parts in the several figures.

The object of my invention is, rst, to make the strap very tight before commencing to bend, which is done .by means of a wedge, g, driven in between the heel end of the shaft and the step c Aafter the strap B is securely confined to the shaft by means of a powerful clamp, which may be made as shown in Fig. 2, or in any other suitable manner that will prevent the strap B from slipping during the 'operation of bending; secondly, to prevent the shaft from drawing or slipping up out of its place while bending it by means of the back and lower projection of the step c, together with its groove in the former A thirdly, to hug all the different sizes of shafts tightly against the former A by means of a wedge, IL, driven in between the overha-n ging projection on the former A and the step c fonrthly, to prevent the strap B from slipping back after the bending process is completed, and at the same time to hold the shaft down in its place on the former A by means of theV two cars b b, the block d, and the wedge e.

To enable others skilled in the art to undera stand my invention, I will describe its construction and operation.

In the accompanying drawings, Arepresents a metal form, which is adapted for giving the proper curve to the heel end of the shaft. On one end of this form a stirrup, a., is formed, and onthe opposite end two projecting ears,

b b, are formed, which are beveled or lean forward, as shown in Figs. 2 and 4.

B represents a flexible metal strap, and C is a T-shaped block ofrcast-iron, which is secured permanently on one end ofthe strap B and adapted to lit in the groove in the stirrup on the lower end of the form A, as shown in Figs. 2 and 4.; and block d is also secured permanently to the strap B, so as to come on top of the strap and back of the cars b b, so that the key-wedge e can be driven between the block d and the ears b b after the bending is completed.

G, Fig. l represent-s a wood bar, having its edge t' curved to the shape desired for the belly of the shaft. To one end of this bar a cross-piece, k, is secured, and upon this cross piece a block, I., is secured, having its inside edge the shape desired for the point of the shaft, leaving a space between the bar G and block l sufficiently wide to receive the shaft. A iiexible metal strap, m, is also used in bending the point of thc shaft. This stra-p is secured permanently about midway to the curved edge i of the bar Gr, as shown in Fig.

l, the other end having a strong hook attached to go against the end of the shaft.

1 have described the construction of the forms, and will. now describe their operation in bending a shaft. rlhe form A should be secured to the floor before commencing to bend. The block c is inserted beneath the overhang.- in g portion of the stirrup a., after which a shaft, A', Fig. 2, is inserted between the strap B and the form A, the end of the shaft A resting on the step c. The strap B is then securely confined to the shaft A' with the clamp j', or its equivalent, after which the wedge g is driven in between the end of the shaft A' and the step c until the strap B is very tight. Another wedge, h, is driven in between the overhanging end of the stirrup and the step c. AWhen the shaft is thus thoroughly conlined it is bent down on the form A, and the wedge e is driven in between the block d and the ears b b. The clamp f is then removed. The shaft thus bent, together with the form A, is then removed from the door and the point of the shaft A thrust in between the block Z and strap m. The pointed en d of the put away and another shaft bent in the same manner.

Havingthus described my invention, What I desire to secure by Letters Patent isl. In the process of bending shafts for vehieles, the Wedge g, for the purpose specied.

2. rlhe Wedge h, for the purpose speeied.

3. The back or outer projeetion on the step c, for the purpose specified.

4. The ears b b and the beveled Wedge e, to-

gether with the block d, for the purposes speci- 5. Broadly, the means, as herein set forth, for tightening and holding the strap upon the shaft during the operation of bending, substantially as speoied.

JESSE W. DANN.

Witnesses:

L. J. GRITGHFIELD, ROBERT CUTLER. 

